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Politics : Sioux Nation
DJT 14.13+1.6%Jan 21 3:59 PM EST
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To: SiouxPal who wrote (55449)1/21/2006 10:10:14 AM
From: TigerPaw  Read Replies (1) of 362466
 
each engine applies a tad different amount of pressure to the Querty alphabet thingies.

No, Karen was right.

This is not just a case of matching characteristics of a printer with a document. That would require that the printer be found and matched (like matching a bullet to a gun). Instead the govt. has the printer manufacturer place the serial number on the document and this serial number is recorded when you send in your warrenty card (or at least to the store if you don't).

eff.org

At the request of the United States Secret Service, manufacturers developed mechanisms that print in an encoded form the serial number and the manufacturer's name as indiscernible markings on color documents. The Secret Service and manufacturers would be able to decode these values from the markings and in the event a color machine was used to print a suspected counterfeited document, these values would be used with customer information to discover the identity of the machine's owner.

I think that is how they know each fingerprint of our printers. I'm not very technical.
Simply put, the printers are required to encode the serial number in a pattern of tiny yellow dots spread around the paper. They don't look like more than a haze, but they contain a string of numbers.

TP
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